Vaporizing blue-flame burner



May 4 1926.

5 A. FRENCH VAPORIZING BLUE FLAME BURNER Fil ed June a, 1922 PatentedMay 4, 19.2 6. I V I ETED STATES PATENT OFFICE.

CHARLES A. FRENCH, OE CHICAGO, ILL INOIS', -ASSIGNOR TO INTERNATIONALHAR- VESTEB COMPANY, O]? CHICAGO; ILLINOIS,'A CORPORATION OF NEW JERSEY.

varonrzme BLUE-FLAME BURNER. i Application filed'hine s, 1922. Seria1No.. 566 ,711.

Z '0 old whom it may concern: plied at low pressure through the pipe 6,

Be it known that I,- Cnannns A. FRENCH, part of it enteringthe maincombustion a citizen of the United States, residing at chamber and part-flowing through the pas- Chi'cago, in the county of Cook and State sage17 to the nozzle 13 Where it miXes with of Illinois, have inventedcertain new and the vaporized fuel to form a very rich mix- 60 usefulImprovements in Vaporizing Blue; ture entering the precombustlionchamber Flame Burners, of which the following is 15,1the supply of airbeing insufficient for a full," clear, and 'exact'spccification.complete combustion. The mixture is then My invention relates tovaporizing blue ignited in the precombustion chamber in flame burnersand, in the form shown in any one of a number'of well known ways 65 thedrawings, is particularly adapted for such for example as by a torchinserted use as a pilot burner for heating the main through the chamber9. The fuel then burner in an automotive .steam power plant burns in theprecombustion chamber with a but is not limited thereto, being suitablefor small amount of air, the heat from the comuse wherever a blue flameburner is desired. bustion being insufficient to break down the 70Referring to the drawings fuel'but sulficient to insure its rapid andFig. 1 is a longitudinal section of my complete combustion in the maincombusburner in what I now believe to be a pretion chamber 9 on additionof the air comferred form, the section being taken on the ing throughthe nozzle 16 at a relatively line 1 1 of Fig. 2; high velocity. The airdischarging through 7 Fig. 2 is a vertical section on the line 2R2 thenozzle 16 has an aspirating effect on the of Fig. 1. chamber 15 andnozzle 13 thereby consid- The burner has a body or casing 5 to erablyincreasing the discharge of vapor which air is supplied through a pipe 6from the vaporizing chamber and the flow and fuel through a connection7. The fuel of air through the by-pass 17. As soon as 80 pipe leads to avaporizing chamber 8 surthe burner is .started, heat from the chamberrounding the combustion chamber9 and con- 9 will vaporize the fuel inthe wicking 10 tains a quantity of asbestos wicking or other which,entering the chamber 15, will burn absorbent material 10 which becomessatwith sufllcient heat to keep the walls of the I urated with the fuel.A passage 11 leads chambers 9 and 15 hot.. If the supply of from thevaporizing chamber to an annular fuel fails or becomes too small, aflame will passage 12 surrounding a nozzle 13 and comburn in theprecombustion chamber 15 and "municating with the throat of the nozzlekeep the burner hot for a considerable through a number of smallorifices 14c. The length of time or until the fuel stored in nozzledischarges into a precombustion the absorbent material 10 is vaporizedand chamber 15 communicating with the main consumed. combustion chamber9 at one end. The air Having thus described my invention, inlet 6discharges directly into the combuswhat I claim as new and desire tosecure tion chamber 9 through a nozzle 16 in proxby Letters Patent is:imity to the precombustion chamber and, be- 1. In a burner, thecombination of a casfore reaching the nozzle 16 has a branch 17 inghaving a main combustion chamber leading to the nozzle 13. Plugs 18, 19,20, therein, a vaporizing chamber surrounding 21 and 22 are screwed intothe body 5- in the combustion chamber, means for supplyalignment withthe several passages and the ing fuel thereto, a precombustion chamberopenings into which they are screwed proin the casing communicating withthe main vide a convenient means for machining the combustion chamber atone end and having body and afford access to the passages and a nozzleat the other, means for conducting nozzles for inspection and repair.vaporized fuel from the vaporizing cham- In operation, fuel is suppliedto the vaporher to the nozzle, means for supplying air izing chamberthrough the pipe 7 and satto said nozzle to mix with the vaporized fuelurates the wicking 10. The body 5 is heated in the precombustionchamber, and means by a torch or other external flame to vaporforsupplying air to the main combustion ize the fuel and cause the vaporsto fill the chamber. passages 11 and 12 and enter the nozzle 13 2. In aburner the combination of a casthrough the openings 141. Air is thensuping having amam combustion chamber, a

precombustion chamber and an air nozzle communicating with the mainchamber at one end, a fuel vaporizing chamber adja cent the combustionchamber, a nozzle discharging into the precombustion chamber, a passageleading from the vaporizing cham her to the nozzle, and an air inletpassage discharging into both of said nozzles. 1

3. In a burner, the combination of a casing having a main combustionchamber, a precombustion chamber and an air nozzle communicating withthe main chamber at one end, a fuel vaporizing chamber surrounding themain combustion chamber and containing a quantity of absorbent material,a nozzle discharging into the precombustion chamber, a passage leadingfrom the vapor izing chamber to the nozzle, and an air inlet passagedischarging into both of saic nozzles.

4. In a burner, the combination of a casing having a main combustionchamber, a precombustion chamber and an air nozzle communicating withthe main chamber, said vair nozzle also communicating with the pretheprecombustion chamber by aspiration into the main chamber.

In testimony whereof I aflix my signature.

' CHARLES A. FRENCH.

into the precom-

